this is how iam splitting the textarea post.
$replace_br = str_replace('<br>','\n', $_POST['content_excel']);
$replace_end = str_replace(' ','', $replace_br);
$req_array_excel = explode('$tr$',$replace_end);
as you can see iam exploding the textarea values not just once. Its just a little code snippet
list($anz_eintra_prev, $row_prev, $column_prev,$inhalt) = explode('_tr_', $eintraege[$s-1]);
as you can see iam creating a list and then putting it in setCellValueByColumnAndRow.
butI dont know where the problem should be.
--> the same problem i had with a normal array. You can see it here
but i solved the problem by changing normal single ' character by a double " character in the array. But i dont know why the problem is caused by that. Because normal ' character is the same like double " in php.